Links to WADL instances for RESTful endpoints are available from {base endpointaddress}/services, in addition to SOAP endpoints if any. For example, given
Base address : 'http://localhost:8080'
WAR name : 'store'
CXFServlet : '/books/*'
jaxrs:server/@address = '/orders'
and visiting
> http://localhost:8080/store/books
> http://localhost:8080/store/books/services
will let you see all the WADL links.
Note that you can override the location at which listings are provided (in case you would like '/services' be available to your resources) using 'service-list-path' CXFServlet parameter, example:
> 'service-list-path' = '/listings'

The service-list-path must be changed to keep using the OpenNMS ReST API without changes.